What are traditionally and popularly called possessive adjectives — in linguistic analyses possessive pronouns, possessive determiners or genitive pronouns — are a
part of speech that prototypically modifies a
noun by attributing possession to someone or something (but see below). Depending on the theory the grammar subscribes to,
English "possessive adjectives" are
determiners or
pronouns: possessive determiners, possessive pronouns, dependent genitive pronouns, weak possessive pronouns, and so forth. They are not
adjectives, because they can be substituted for and cannot co-occur with another determiner such as an
article or a
demonstrative:the black bookthat black bookyour black book*the your black book*that your black book*your the black book*your that black book
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